On Fri, Apr 19, 2013 at 11:26 AM, Craig Lewis <clewis@xxxxxxxxxxxxxxxxxx> wrote: > Playing with this a big more, I think I see how to accomplish what I want > inside Ceph. > > I'm only concerned about backing up and restoring the contents of the RADOS > Gateway. > > Using rados mksnap, I can snapshot the 4 gateway pools: > .rgw > .rgw.control > .rgw.gc > .rgw.buckets > > Is there a way to snapshot the four pools (or all pools), in a single > command? So far, it looks like I'll have to snap them one at time. Nope, there's not a cross-pool snapshotting mechanism, sorry. > To restore, the contents of the .rgw.buckets pool looks fairly straight > forward. I'll know the gateway object names that I need to restore, and > rados ls -p .rgw.buckets will let me map the gateway object to a rados > object. I can use rados get to extract the contents of each object, save to > a local file, then and manually restore to the RADOS Gateway. Keep in mind that a single RGW object can be chunked into multiple RADOS objects if it's of sufficient size. These are named predictably so you should be able to do the translation, though. > It would be nice if I could start up a radosgw with a --read-only and --snap > snapshot1 argument, but a manual solution is acceptable at this stage. I > won't have to do this often, but I need to know that I can do it if > necessary. I think it should work in theory, but if you're talking about copying data in and out of the cluster it's likely to take a while if you actually need to do it. It's also not a use case that anybody's investigated yet, so you should test it out before committing! :) -Greg Software Engineer #42 @ http://inktank.com | http://ceph.com _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
 |